Thread-cutting apparatus.



S. PREY. THREAD CUTTING APPARATUS. APPLICATION FILED Nov.z.1911.

Patented May 14, 1912.

COLUMBIA PLANOGIMPN Cow^smNaToN. D. C.

UNTTED STATES PATENT OFFICE.

SIMON FREY, 0F ZURICH, SWITZERLAND.

THREAD-CUTTING APPARATUS.

To all whom t may concern.'

Be it known that I, SIMON FREY, a citizen of the Swiss Republic, and aresident of 17 Mythenstrasse, Zurich, Switzerland, have invented certainnew and useful Improvements in Thread-Cutting Apparatus, of which thefollowing is a specification.

This invention relates to improvements in actuating and lubricatingmeans for thread cutting devices of the character employing a pluralityof dies, each having thread cutting faces thereon, the entire apparatusbeing embodied in a single composite structure.

The invention will be more fully described in connection with theaccompanying drawings and will be more particularly pointed out in andby the appended claims.

In the drawings :--Figure 1 is a view, partly in section and partly inelevation, of an apparatus embodying my invention. Fig.' 2 is asectional view on the line A-B of Fig. 1. Fig. 3 is a view partly inelevationV and partly in section, of a portion of the apparatus shown inFig. 1. Figs. 4 and 5 are enlarged detailed sectional views of parts ofthe apparatus shown in Fig. 1.

Similar characters refer to similar parts throughout the several views.

In carrying out this invention, and referring to the drawings, a stockbody a is provided with a square frame b, for the reception of coactingdies 1, 2, 3 and 4, and two oil cavities c and d. The stock body a iscircular with respect to its plane and has provided on its periphery,radially extending rectangular-shaped recesses A. The periphery of thestock is surrounded by a band B, which, at its inner circumference, has,at one edge, a projection B engaging in a groove a7 in the stock. Thisprojection B has at its inner side an annular groove B, whichcommunicates with oil receptacles c and cl by means of by-passes a inthe frame b. The band B is provided with an aperture b which is disposedin alinement with the apertures A in the stock and extends to theprojection B. Through this aperture b projects a pawl C adapted tooscillate on a pivot C and is located within a cavity CO of a handlesocket D secured to the band B by means of countersunk screws S. The endof the said pawl gliding on the circumference of the stock in thecentral position, so engages in the recesses A, that when turning thehandle socket by the aid of a tube Ve Specification of Letters Patent.

Application filed November 2, 1911.

Patented May 14,1912.

serial No. 658,201.

screwed into it, the stock with the dies will be turned around the pieceof work, as for example, a pipe, inserted between the latter. In orderto cause the said pawl to have the tendency of always taking a centralposition, that is to say, a position radial to the stock, a coiledspring F is provided on each side thereof, which act-s upon laterallyprojecting arms C on the pawl. From each side of the said handle socketset screws Gr and Gr project into the cavity C0 toward the said pawlarms, whereby the oscillation of the pawl can be restricted to one sideonly or the pawl rendered inoperative. The adjustment of the saidscrews, thus facilitates the use of the stock and dies in either ratchetbrace fashion or in ordinary handle fashion.

Suitably apertured face plates 01.5 and a are provided for the stock a,which form fluid tight compartments of the cavities 0 and el. The handlesocket D has a channel H branching from the middle to each side. Thischannel leads to the groove B of the projection of the band B and is incommunication with the interior of the tube E forming part of thehandle. The free end of the latter is closed by means of a tightlyfitting detachable cap J and contains a piston K inwardly movable by acoiled spring K. This piston serves to force lubricating fluid into thetube E through the channel I-I into the groove B, from whence it passesthrough the slots a into the oil receptacles 0 and (Z, and from therethrough the frame b to the dies as will be subsequently described.

The two receptacles c and cl are arranged in communication with eachother by means of a slot p so that the lubricant contained therein canpass to and fro. In the slot p is a conical plug Q having a portionsemicircular in section whereby lubricant can be passed from either ofthe receptacles c and cl through the slot 79 into a port r formed incommunication therewith in the frame b. The side of the die 3 bearingagainst the frame Z) is provided with a flat recess f from which a portt leads to the cutting surface of the die 3. The fluid which enters theport r flows into the recess s and from there through port t to thecutting surface of the die 3, where it issues and thus lubricates t-hesurface of the work to be operated upon to facilitate the cutting. Therecess s is of such a length that there is no position of adjustment ofthe die in which it will be cut off from the port r. The plug Q can beturned and thus the port r is opened or closed. n

The handle socket D has two lateral projecting portions L. Between theseportions and the band B a space is provided into which projects the endsofa band M, each of the ends having an aperture, as shown in Fig. l, andwhich is detachably secured to the handle socket D and the band B bymeans of screws N. vDiametrically opposite the handley socket D, ahandle D is secured to the band M by means of screws. After turning backthescrews N, the band M with a handle Dcan be removed from the stock aas indicated in'dotted lines of Fig.` 8, and the stock and dies operatedwith a single handle.

Onl the lower edge of the band B is an eX- tension b which fitsaccurately into a ring like ygroove of the cover a5 and forms ajoint'preventing the oil leaving the surface of the stock and dies.

The stock and dies described may be turned at will with one of twohandles in either direction and a continuous supply of lubricant isprovided for the operating dies under any condition.

I claim .l. A thread cutting apparatus comprising in combination, adrum-shaped stock provided with a plurality of recesses in the nperiphery thereof and a fluid chamber, a

die carried by said stock and provided with a fluid conducting port opento the cutting edge thereof :and communicating with the said fluidchamber of said stock, a band surrounding the periphery of said drum,

. movable therewith, and provided with fluid conducting meanscommunicating with its periphery and the said fluid chamber in saidstock, a handle structure secured to said band and provided with acavity adapted to containfluid and in communication with the fluidconducting means of said band, and a ratchet pawl carried by said handlestructure and coacting with the said recesses in the periphery of saidstock to operate the apparatus.

2. A thread cutting apparatus comprising in combination, a drum-shapedstock provided with a plurality of recesses in the 'periphery thereofand a fluid chamber, a

die carried by said stock and provided with a fluid conducting port opento the cutting edge thereof and communicating with `the said fluidchamber of said stock, a band surrounding the periphery of said drum,movable therewith, and provided with fluid conducting meanscommunicating with its periphery and t-he said fluid `chamber in saidstock, a handle structure secured to said band and provided with acavity adapted to contain Huid and in communication with the fluidconducting means of said band, a ratchet pawl carried by said handlestructure and coacting with the said recesses in the periphery of saidstock to operate the apparatus, and means for fixing said pawl in one ofsaid recesses to rigidly, connect said handle structure and saidstock.

3. A thread cutting apparatus comprising in combination, a drum-shapedstock provided with a'plurality of recesses in the periphery thereof anda fluid chamber, a

ie carried by said stock and provided with a fluid conducting port opento the cutting edge thereof and communicating with the said fluidchamber of said stock, a band surrounding the periphery of said drum,movable therewith and provided with fluid conducting means communicatingwith its periphery and the said fluid chamber in `said stock, a handlestructure secured to said band and provided with a cavity adapted tocontain fluid and in communication with the fluid conducting means ofsaid band, a spring actuated piston within the said cavity for feedingthe fluid to said die, and a ratchet pawl carried by said handlestructure and coacting with the said recesses in the periphery of saidstock to operate the apparatus.

= 4l. A thread cuttingapparatus comprising in combination, a drum shapedstock provided with a plurality of recesses in the periphery thereof anda fluid chamber, a die carried by said stock and provided with a fluidconducting port open to the cutting edge thereof and communicating withthe said fluid chamber of said stock, a band surrounding the peripheryIof said drum, movable therewith, and provided with fluid conductingmeans communicating with its periphery andthe said fluid chamber in saidstock, a handle structure secured to said band and provided with acavity adapted to contain fluid and in communication with the fluidconducting means of said band, a second handle structure adapted to bedisposed diametrically opposite said first mentioned handle structurewith respect to said stock, and provided with means for embracing saidband and securing said second mentioned handle structure to said firstmentioned handle structure, and a ratchet pawl carried by said firstmentioned handle and coacting with the said recesses in the periphery ofsaid stock to operate the apparatus.

5. A thread cutting apparatus comprising in combination, a drum shapedstock provided with a plurality of recesses in the periphery thereof anda `Yfluid chamber, a die carried by said stock and provided with a fluidconducting port open to the cutting edge thereof and communicating withthe said fluid chamber of said stock, means adapted to control admissionof fluid into theconducting port of said die, a band sur.- rounding theperiphery of said drum, movable therewith, and provided with fluid connthe periphery of said stock to operate the 10 ducting meanscommunicating with its peapparatus. riphery and the said fluid chamberin said In testimony whereof I aix my signature tock, a handhlsltructure secured to said in presence of two Witnesses.

and and rovi ec with a cavt a a te to contain flld and in communiycatollwith SIMON FREY' the fluid Conducting means of said band, Vtnesses: anda ratchet pawl carried by said handle ALBERT LAEMMLER, structure andcoactng with the said recesses CARL SUBLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

